2011/11/12 Friedrich Romstedt <friedrichromst...@gmail.com>:
> This is my summary of what I found out.

Some small follow-up regarding what might trigger the bug:

http://comments.gmane.org/gmane.comp.python.matplotlib.general/1115 is
a report by Chris Barker indicating as a side-effect that
NISC18030.ttf was present even in 2005.  It "could not be loaded" that
time.  I.e. it didn't cause a Bus error.  That it was attempted to be
loaded indicates that the fontcache was to be rebuilt that time, so
the file must be present.

http://code.google.com/p/anki/issues/detail?id=560 indicates that, in
2008, on a 10.5 OS X the file could "not be loaded" too.  Again, just
the attempt implies that the fontcache was rebuilt.  So the file must
be present, except if the font_manager.py logic of early 2009 is the
result of a dramatic change since then.

It appears very probable that the Bus error is not triggered on 10.5,
but only on 10.6, when building with MACOSX_DEPLOYMENT_TARGET=10.5.
It remains unclear starting from which patch version of 10.6 it
appears, and also if it is a gcc-4.2 only issue.  In the case it is
gcc-4.2 related, it would explain the rarity, because gcc-4.2 was
introduced in 10.6, so who would build with 10.5 deployment target?
If 10.5 is targeted, you mostly need to use gcc-4.0 anyway.  (This is
something I overlooked myself for my own decision until now.)

Friedrich

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